The chain may add drive-through windows and breakfast items

The changes, which also include more advertising, would shift the restaurant chain away from the “fast casual” vision that has long been its trademark, toward a fast-food-style experience more commonly associated with Burger King (NYSE:BKW), McDonalds’ (NYSE:MCD), Wendy’s (NASDAQ:WEN) or Yum‘s (NYSE:YUM) Taco Bell, Bloomberg noted.